Bumping-post



A. ROBERTSON.

BUMPING POST.

APPLICATION FILED JUNE 23, 1917.

Patented July 5, 1921 2 SHEETS-SHEET I.

A. ROBERTSON.

BUMPING POST.

APPLICATION FILED JUNE 23, 1917. Patented July 5., 1921.

2 SHEETS-SHEET 2 AL X NDE mmsommmmm CITY, Ass1 noar a-a1vmmcm amma:

I {a licationfiledqunees, 1917;: gseriei-no. 176,456. l

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'Beit known that IQA'LEXANDER RO ERT- SON, a citizen of the UnitedState's and resident of Granite City, in the'countyrof Madison and Stateof I1linois,' have .invented certain new and useful Improvements inBumping-Posts, of which the following is a specification.

My present invention relates to improvements in bumpers and similardevices for use on railroads.

The principal objects of my present invention are to provide means formore gradually retarding the momentum of a car or train of cars than canbe accomplished by the bumpers or buffers heretofore ordinarily arrangedat the terminals of railway tracks, to provideimproved means forpreliminary retarding of the cars before they receive their final check,to provide improved means for supporting the bumpers,

to provide improved means for connecting the bumpers to the track, andgenerally to improve, simplify and cheapen the construction of railroadbumpers.

In attaining these and other objects and advantages to be hereinafterset forth I have provided a construction two embodiments of which areillustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of bumping device. constructed inaccordance with my present invention;

Fig. 2 is a plan view of the same;

Fig. 3 is a section on the line 33 of Fig. 1;

Fig. 4 is a section on the line 44 of Fig. 1; and I Fig. 5 is a sectionof a modified form of construction.

The bumping device illustrated in the drawings comprises a series ofbumpers 10 mounted on the track. At one end of the series is a bumper 11of greater height. than the others designed to bring the car to a finalstop if the car has not been stopped previously. The bumpers are mountedon inclined portions 12 of the track rails. The track is upwardlyinclined at this point to aid the bum ers in checking the movement ofthe cars. The bumpers 10, shown in Figs. 1 to 4 are formed with uppertread surfaces 13 comprising a central fiat portion 17 and twodownwardly inclined segmental portionsql8 These segmentalportions arepreferably formed so that the adjacent: portions :18 of two adjoiningbumpers form a part of lPatenteil thev same circle. The trea'd surfaces13 are providedon their innenside-wi'th flanges 14:.

The flanges 15 of the car wheel's rest on the tread surfaces 13 and arekept in position laterally by the flanges 14:. In the form ofconstruction shown in Fig. 5 the tread portion of the wheel rests on thetread surface 13 of the bumper and the flange engages the inner side ofthe bumper as it does the inner side of the track rail under normalconditions.

The form of construction shown in Figs. 1 to 4 is preferable undercertain conditions.- For example the upper portions 17 are apt to catchthe brake shoes unless the tread surface of the car wheel is raisedabove the tread A surface of the bumpers by the height of the wheelflange 15.

The bumpers are formed with downwardly projecting portions 19 havingslots therein of substantially the same contour, as the head and web ofthe rail so that the bumpers can be slid along the rail longitudinally.The portions 19 are arranged to rest on the flange of the rail and sosupport the bumper laterally and prevent tilting.

Longitudinal movement of the bumpers under buffing strains is preventedby bolts 20 passed through the web of the track rail at each end of theseries of bumpers and also by the spikes 21 which are driven closeagainst one side of the projections'19.

By mounting the bumpers on the rails there is little danger of thebumpers being torn loose from the track by the bufiing strains which aretransmitted directly to the track itself. In this connection it willalso be observed that each section of the bumper is slightly spaced awayfrom the adjacent sections so that the bufling strains on each sectionare not transmitted to adjacent sections. This greatly reduces thechances that the spikes 21 or bolts 20 will be sheared ofl".

Having thus described my invention and illustrated its use, what I claimas new and desire to secure by Letters Patent is:

tread surfaces, said projections extending above said track to asubstantially uniform height. i

'2. The combination with the track of a bumper comprising a memberhaving a lower surface adapted to rest on the track rail head and havingan upper treadsurface comprising a series of undulating portions' 3; Thecombination With the track of a bumper mounted thereon and having a s e'ries of undulating tread surface portions for engagement With the treadportion-0f a car Wheel. v e. The combination with the track of a seriesof bumpers mounted upon the said track'and spaced apart from each other,

preventing movement of each bumper relatively to the track, wherebybuifing strains on one bumper are not transmittedto the others.

Signed at Sharon, Pa., this 21st day of May, 1919.

.Witnesses:

ALBERT H. SAU'ER, A. 0. JAMES.

ALEXANDER'ROBERT'SON. a

